/* ===========================================================
   答疑中心 /answers/
   作用域：.page-faq
   =========================================================== */

.page-faq {
  --faq-ink-soft: rgba(20, 32, 43, 0.78);
  --faq-card-line: rgba(20, 32, 43, 0.1);
  --faq-glow: rgba(53, 230, 210, 0.14);

  background: var(--abyss-900);
  color: var(--mist-200);
  overflow-x: clip;
}

.page-faq .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ---------- 通用区块标题 ---------- */
.page-faq .faq-head {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  margin-bottom: clamp(1.8rem, 4vw, 2.8rem);
}

.page-faq .faq-head__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.6vw, 2.05rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: #fff;
  margin: 0;
  max-width: 22ch;
}

.page-faq .faq-head--paper .faq-head__title {
  color: var(--ink-900);
}

.page-faq .faq-head--paper .index-tag {
  color: var(--tide-700);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding: calc(var(--header-total) + 2.4rem) 0 clamp(2.6rem, 7vw, 4.4rem);
  background:
    radial-gradient(120% 90% at 6% -10%, var(--faq-glow), transparent 62%),
    linear-gradient(180deg, var(--abyss-900) 0%, var(--deep-800) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(53, 230, 210, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(53, 230, 210, 0.07) 1px, transparent 1px);
  background-size: 68px 68px;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
}

.page-faq .faq-crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

.page-faq .faq-crumbs__sep {
  color: var(--slate-500);
}

.page-faq .faq-hero__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--line-cyan);
  border-radius: var(--r-pill);
  margin-bottom: 1.2rem;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 6.2vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: -0.022em;
  color: #fff;
  margin: 0;
  max-width: 15ch;
}

.page-faq .faq-hero__lede {
  margin: 1.2rem 0 0;
  max-width: 40rem;
  font-size: clamp(1rem, 1.7vw, 1.08rem);
  line-height: 1.85;
  color: var(--mist-200);
}

.page-faq .faq-hero__pills {
  margin-top: 1.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ---------- 置顶两条 ---------- */
.page-faq .faq-top {
  padding: clamp(2.6rem, 6vw, 4.2rem) 0;
  background: var(--deep-800);
}

.page-faq .faq-top__grid {
  display: grid;
  gap: 1.6rem;
}

.page-faq .faq-top__cards {
  display: grid;
  gap: 1rem;
}

.page-faq .faq-top-card {
  position: relative;
  background: var(--paper-100);
  border: 1px solid var(--faq-card-line);
  border-radius: var(--r-lg);
  padding: 1.5rem 1.4rem 1.5rem 3.6rem;
}

.page-faq .faq-top-card__num {
  position: absolute;
  left: 1.15rem;
  top: 1.55rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--coral-500);
}

.page-faq .faq-top-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 2.6vw, 1.3rem);
  line-height: 1.36;
  color: var(--ink-900);
}

.page-faq .faq-top-card p {
  margin: 0.75rem 0 0;
  font-size: 0.99rem;
  line-height: 1.85;
  color: var(--faq-ink-soft);
  max-width: 34rem;
}

.page-faq .faq-top__figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.page-faq .faq-top__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-cyan);
  background: rgba(6, 26, 46, 0.6);
  object-fit: cover;
}

/* ---------- 按主题浏览 ---------- */
.page-faq .faq-topics {
  padding: clamp(2.6rem, 6vw, 4.2rem) 0;
  background:
    linear-gradient(180deg, var(--deep-800) 0%, var(--abyss-900) 100%);
}

.page-faq .faq-topics__figure {
  margin: 0 auto clamp(1.6rem, 4vw, 2.4rem);
  max-width: 640px;
}

.page-faq .faq-topics__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-cyan);
  object-fit: cover;
}

.page-faq .faq-tabs__list {
  display: flex;
  gap: 0.5rem;
  flex-wrap: nowrap;
  overflow-x: auto;
  padding-bottom: 0.4rem;
  margin-bottom: 1.5rem;
  scrollbar-width: none;
}

.page-faq .faq-tabs__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-tabs .tab {
  flex: 0 0 auto;
  min-height: 46px;
  padding: 0.5rem 1.15rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-cyan);
  background: transparent;
  color: var(--mist-200);
  font-family: var(--font-body);
  font-size: 0.94rem;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-tabs .tab:hover {
  border-color: var(--line-strong);
  color: #fff;
}

.page-faq .faq-tabs .tab[aria-selected="true"] {
  background: rgba(53, 230, 210, 0.14);
  border-color: var(--cyan-400);
  color: #fff;
  font-weight: 600;
}

.page-faq .faq-panel {
  padding: 1.5rem 1.3rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: rgba(6, 26, 46, 0.55);
}

.page-faq .faq-panel__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan-400);
  letter-spacing: 0.02em;
}

.page-faq .faq-panel__note {
  margin: 0.7rem 0 0;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--mist-200);
  max-width: 34rem;
}

.page-faq .faq-panel__tags {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-faq .faq-panel__tags li {
  padding: 0.34rem 0.85rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-cyan);
  font-size: 0.86rem;
  color: var(--mist-200);
  background: rgba(53, 230, 210, 0.06);
}

/* ---------- 全部问题（纸色阅读面） ---------- */
.page-faq .faq-questions {
  padding: clamp(2.6rem, 6vw, 4.4rem) 0 clamp(2.8rem, 6vw, 4.6rem);
  background: var(--paper-100);
  color: var(--ink-900);
}

.page-faq .faq-list {
  display: grid;
  gap: 0.7rem;
}

.page-faq .faq-item {
  background: var(--paper-200);
  border: 1px solid var(--faq-card-line);
  border-radius: var(--r-md);
  transition: box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: rgba(53, 230, 210, 0.65);
  box-shadow: inset 3px 0 0 var(--cyan-400);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 52px;
  padding: 0.9rem 1.15rem;
  cursor: pointer;
  list-style: none;
}

.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
  border-radius: var(--r-md);
}

.page-faq .faq-item__q-text {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink-900);
}

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: var(--coral-500);
  transform: translate(-50%, -50%);
  transition: transform 0.2s var(--ease);
}

.page-faq .faq-item__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .faq-item__a {
  padding: 0 1.15rem 1.15rem;
  max-width: 46rem;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 0.97rem;
  line-height: 1.78;
  color: var(--faq-ink-soft);
}

.page-faq .faq-list__more {
  margin: 2rem 0 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-list__more a {
  color: var(--tide-700);
  text-decoration: none;
  border-bottom: 1px solid rgba(20, 69, 107, 0.35);
}

.page-faq .faq-list__more a:hover {
  border-bottom-color: var(--coral-500);
  color: var(--coral-500);
}

/* ---------- 还没找到答案 ---------- */
.page-faq .faq-help {
  position: relative;
  padding: clamp(2.8rem, 6vw, 4.6rem) 0;
  background:
    radial-gradient(90% 70% at 90% 0%, rgba(255, 107, 74, 0.12), transparent 60%),
    var(--abyss-900);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 2rem;
}

.page-faq .faq-help__title {
  margin: 0.9rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.8vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: -0.018em;
  color: #fff;
  max-width: 16ch;
}

.page-faq .faq-help__text {
  margin: 1rem 0 0;
  max-width: 34rem;
  font-size: 0.99rem;
  line-height: 1.85;
  color: var(--mist-200);
}

.page-faq .faq-help__cta {
  margin-top: 1.6rem;
}

.page-faq .faq-help__contacts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-faq .faq-help__contacts .contact-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.4rem 0.9rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line-cyan);
  border-radius: var(--r-md);
  background: rgba(6, 26, 46, 0.6);
}

.page-faq .faq-help__contacts .contact-label {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}

.page-faq .faq-help__contacts .contact-value {
  font-size: 0.97rem;
  line-height: 1.6;
  color: var(--mist-200);
  word-break: break-word;
}

.page-faq .faq-help__contacts .copy-btn {
  min-height: 44px;
  padding: 0.35rem 0.95rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-cyan);
  background: transparent;
  color: var(--cyan-400);
  font-family: var(--font-body);
  font-size: 0.84rem;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-help__contacts .copy-btn:hover {
  border-color: var(--cyan-400);
  color: #fff;
}

/* ---------- 右侧刻度索引 ---------- */
.page-faq .faq-tick {
  display: none;
}

/* ---------- 平板起 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-top__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-top__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 2.2rem;
    align-items: start;
  }

  .page-faq .faq-top__cards {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-panel {
    padding: 1.9rem 1.9rem;
  }

  .page-faq .faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem 1rem;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 3rem;
    align-items: start;
  }

  .page-faq .faq-tick {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    position: fixed;
    right: 1.1rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
  }

  .page-faq .faq-tick__item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--r-pill);
    border: 1px solid var(--line-soft);
    background: rgba(6, 26, 46, 0.75);
    font-family: var(--font-mono);
    font-size: 0.74rem;
    letter-spacing: 0.04em;
    color: var(--slate-500);
    text-decoration: none;
    transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
  }

  .page-faq .faq-tick__item:hover,
  .page-faq .faq-tick__item[aria-current="true"] {
    border-color: var(--cyan-400);
    color: var(--cyan-400);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-tick {
    right: 2.2rem;
  }

  .page-faq .faq-top-card {
    padding: 1.9rem 1.8rem 1.9rem 4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tabs .tab,
  .page-faq .faq-item,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after,
  .page-faq .faq-help__contacts .copy-btn,
  .page-faq .faq-tick__item {
    transition: none;
  }
}